【摘要】 为了提高诊断效率与诊断结果的可靠性,根据网格结构的杆件单元数总是大于节点数的特点以及网格结构连续化分析的思想,提出了基于BP神经网络的面向节点的结构损伤定位方法,即以结构中与损伤杆件相关联的节点来指示其损伤位置,并作为神经网络的输出参数.结合结构损伤的三步诊断策略,通过对一个平面桁架的损伤诊断,验证了方法的有效性.更多还原

【Abstract】 In order to improve the damage diagnosis efficiency and reliability of BP neural networks, based on the fact that the number of the nodes in a grid structure is far less than that of the elements, the authors give the localization strategy of nodes oriented grid structural damage, i.e. the nodes related to damaged elements are used to denote the damage location of the elements and act as the output parameter of neural networks. Combined with a three-step damage diagnosis approach, a numerical planar truss damage diagnosis is carried out, and the results indicate that the method is practically available with significant effectiveness.更多还原